Base portion of a vacuum cleaner



FIG. 1 is a perspective view of a base portion of a vacuum cleaner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a perspective view of a second embodiment thereof;

FIG. 8 is a front view thereof;

FIG. 9 is a rear view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a right side view thereof; and,

FIG. 12 is a top view thereof. 

The ornamental design for a base portion of a vacuum cleaner, as shown and described. 